Condensed billing device



zen 119a? ATTORNEYS INVENTOR ZZc/ze y 17, 1932- E. A. DAVIDGE CONDENSED BILLING DEVICE v Filed June 7, 1930 Patented May 17, 1932 UNI TE 1) STATES PATENT o-FFICE EBENEZER ALFRED 'DAVIDGE, OF LONDON, ENGLAND, ASSIGNOR TO ROYAL TYPE- WERITER COMPANY, INC., OF NEW YORK, N. Y., -A CORPORATION OF NEW 'YOBK CONDENSED BILLING DEVICE Application .filed June v7, 1930. Serial No. 459,740.

' This invention relates to certain improvements over the patent to Michelsen 1,595,162, August 10, 1926. In this Michelsen patent a rotatable feed member is provided and an operating mechanism cooperates with the rotatable'member to feed the invoice forwardly a "maximum distance of approximately two and one-eighth inches above the writing line so as to "position the writing line below the printed matter on the "invoice. This forward feeding movement of the invoice is 7 brought about an operating handle and a clutch disposedintermediate the handle and the'rotatable feeding member,thehandlehaving a maximum rotati've movement less than a complete revolution. When the handle is moved forwardly both the invoice and the 2.)" record sheet are moved backwardly for a distance less than they are moved forwardly. This lesser movement is brought about by 'a means for automatically disconnecting the clutch and subsequently connecting the'isame 3o during the forward movement of the operating ghandle. Consequently during the forward movement of the operating handle the invo-icehas been fedbackwardly to a position .where it may be readily removed and the rec- 0rd sheet has been moved backwardly so as to properly position the same for the next.

line of writing;

In applicants invention means .are 'pro- .vided for feeding'the invoice forwardly a dis -30 "tance of approximately five inches above the writing line in order to take care of invoices having a greater depth of printed matter than can be employed in connection with the .Michelsen construction. This is brought 1'? about through the medium of an operating handle which is adapted to be rotated more than a revolution. Means are also provided for adjustably limiting the forward feeding movement of the rotatable member whereby different degrees ofamovemen't may be transmitted to the feeding member "to adapt the same for bills having different depths of printed matter thereon.

In the accompanying drawings Figure 1 is a right hand end elevationof 5 a typewriter carriage embodying my invention.

Figure '2 is a sectional view taken on the irregular line 22 of Figure 1,

Figure 3 is .a fragmentary view'in elevation showing the parts enlarged and certain of the parts in section,

Figure 4 is a crosssectional viewtaken on the line 4-4 of Figure 5, I 1

Figure 5 .is a .front elevation of Figure 1, 5 parts thereof being shown in section,"

Figure 6 is a detailed crosssectional 'view' taken on the line 16'6 of 'FigureQ,

Figure 7 is a perspective View showingthe movable stop separated from its support,

Figure 8 is a perspective view of the movable pawl throw-out trip, and

Figure 9 is a diagrammatic view showing in full lines the position of the paper being introduced and in dotted lines showing the 5* position of the paper after being fed for-' wardly to its extreme position.

The drawings disclose the conventional platen or rotatable feeding .member A having a shaft B mounted in the side frames C of the carriage, only one ofsaid frames being shown. Both ends of the shaft B are provided with finger pieces D, one being carriedby 'a sleeve E which in'turn is secured v to ,a coupling shaft 5 fixed to the platen 5 shaft B.

Outside of the carriage frame C the platen shaft'is provided with a sleeve 6 upon which is mounted a disc 7 which is held against rotation relative to the shaft by means of a stud 8 carried by the adjacent side frame C. The disc 7 is provided near its periphery with a series of openings't) which extend substantially around the disc but 'termmate in i spaced relation on opposite sldes of the stud 8. Journaled on the sleeve 6 is an arm 10 and fixed to the outer end of this arm is a cylinder 11 containing a stop pin 12 and a spring 13 for yieldably urging the pin outwardly'toward the disc '7. The stop pin 12 is provided with a radially extending finger piece 13, the shank of which projects through a slot 14 formed in the cylinder 11. This slot 14 extends longitudinally of the cylinder and is provided with a laterally extending recess or seat 15 adapted to receive the finger piece 13 and thereby retain the stop pin 12 in a retracted position. Normally the outer end of the stop pin 12 projects into one of the openings 9 of the disc 7 as shown in Figure 2. Under some circumstances, it is desired to-retract the stop pin 12 so that the outer end thereof will not project beyond the outer face of the disc 7 and for this purpose the finger piece 13 is positioned in the offset recess 15 so as to retain the stop pin in the positicn shown in Figure 3. I

Fixed to the platen shaft B and located just outside the disc 7 is a ratchet wheel 16. The teeth ofthis ratchet wheel 16, as well as the openings 9 in the disc 7, correspond with the teeth in the usual line spacing ratchet wheel. In other words, the ratchet wheel. 16 has twenty-eight teeth and these corre-- spond in number to the teeth on the line. spacing, ratchet wheel. An operating handle 17 is provided with a hub 18 which is journaled on the coupling shaft 5 to rotate freely thereabouts. A pawl 19 is pivotally connected as at 20 to the operating handle 17. This pawl is disposed in alinement with the ratchet wheel 16 and consequently when the pawl is brought into engagement with the teeth of said ratchet wheel and the handle 17 swung in either direction the rotatable feeding element or platen A will be rotated. The pawl is provided intermediate its ends with a cam recess 21 having seats or dwell portions 22, 22 at its opposite ends- A pin 23 carried by a bell crank lever 24 is disposed in the recess 21 and is adapted to be engaged in either of the seats or dwells 22. The lever 24 is pivoted to the handle 17 and a spring 25 is connected to the end of the lever opposite the pin 23 and to the pawl 19. The spring 25 functions to retain the pin 23 in either of the seats 22 by reason of the spring crossing the pivot of the lever 24 when said lever is moved to either of its extreme positions.

When the handle 17 is in its rearmost position as shown in Figure 1 the pin 23 lies in the dwell 22 nearest the nose of the pawl 19 and the pawl is held out of engagement with the ratchet wheel 16 by the spring 25.. If the lever 24 is moved to bring the pin 23 'into the dwell 22 nearest the pivot 20 of the pawl, the pawl will be positively moved into engagement with the ratchet wheel 16 and the pawlv will be held in positive engagement with the ratchet wheel because of the a clutch which is interposed between the opcrating handle 17 and the rotatable feeding element or platen A. The engagement and disengagement of the pawl with the ratchet member is brought about in the following manner. Fixed to the disc 7 and projecting inwardly therefrom is a fixed stop 26. R0- tatably mounted on the sleeve 6 between the pin carrying arm 10 and the disc 7 is a pawl throw-out trip 27. This trip is in the nature of a radially extending arm and the outer end thereof is bent outwardly over the periphery of the disc as at 28 and thence downwardly as at 29, the latter being thus positioned to be engaged by the pin 23. As viewed in Figure 1 the stop pin 26 is located on the right hand side of the ratchet wheel 16, the adjustable stop pin 12 on the opposite side-ofthe ratchet wheel, and the pawl throw-out trip 27 between the stop 26 and the stop pin 12. The right hand edge 30 of the trip, as viewed in Figure 1, is adapted to engage the stop 26 and thereby limit the throw-in trip pin 31 is located-closer to the.

pivot of the handle 17'than the pivot pin 23 of the pawl actuating lever 24 when the pawl is engaged with the ratchet wheel 16. Thus when the handle 17 is moved rearwardly from the dotted line position at the left of Figure 1 to the full line position thereof, the pawl 19 will be in engagement with the ratchet wheel 16 and consequently the pin 23 will pass over the stop'pin 31. In the full line position of the handle 17 the pin 23 has been forced against the edge 29 of the pawl throw-out trip 27 which is now at rest against the stop 26. This contact between the pin 23 and the edge 29causes the bell crank lever 24 to be rocked so as to move the pin along the cam recess 21 and into. the dwell 22 which is farthest from the pivot of the pawl. Thus the spring 25 functions to retain the pawl disengagedfrom the ratchet wheel 16. The first part of the forward movement of the handle 17 will therefore be a free movement in'that the clutch will be disconnected and the rotatable element or platen A will not be rotated. Just as soon, however, as the handle 17 in. its forward movement reaches a position whereby the pin 23 will engage the pawl throw-in trip pin 31, the bell crank lever 24 will be rocked and the pin 23 will be moved into the dwell 22 which is nearest the pivot of the pawl. This movement of the pin 23 automatically moves the pawl into operative engagement with the ratchet wheel 16 so that upon continued forward move= ment of the handle 17 the rotatable element or platenA will be rotated backwardly for a distance lessthan it was rotated forwardly, the differential in the movement beingdetermined by the distance between the pawl throw-out trip27 when it is against the stop 26. and the pawl throw-in trip pin 31.

When it is desired to feed the invoice any predetermined distance less than a complete revolution of the rotatable feedingelement A, the movable stop pin 12 is projected through one of the openings 90f the disc 7 so as to position said stop pin into the path of the operating handle 17. 7

When it is desired to feed the invoice forwardly a distance greater than a complete revolution of the rotatable feeding element A, the :stop pin 12 is retracted and held in its retracted position so as to permit the operating handle 17 to pass sa d pin, thereby permitting said handle to be rotated through a distance greater than one revolution.

In operation, assuming that invoices having short printed matter'are' being employed, my invention willbeoperated in substantially :the same manner as inthe Michelsen patentreferredto above. Assuming that an invoice has just been written, the operating handle 17 will he in its rearmost position as shown in Figure 1, the pawl 19 being disengaged from the ratchet wheel 16. The operatinglrandle will now bemoved forwardly until it is stopped by the pin 23-engaging the adjustable stop pin 12. During the first part of this forward movement the clutch will remain disconnected and consequently the rotat-able feed element A will not be rotated, but during the latter part oft-he 'feed movement of the. handle the clutch will be automatically connected and the feed element A will be rotated. As *above stated the forward movement of the handle '17 causes the feeding element A to be rotated backwardly and consequently both the record sheet "and the invoice will be simultaneously fed backwardly in unison. The written invoice is then removed. A new invoice such as E as is shown in Figure 9 will then be presented .to the feeding element. The handle 17 which is now clutched'to the rotatable element will be moved rearwardly until the pin 23 engages the pawl throw-out trip 27 to cause the same to disengage the clutch; Thus both the in-.

In "theoperationabove described, if the movable stop pin 12 'be projected through. any

of the openings 9'in front of the first-stop pi-n'3l, a variable forward movement of not more than approximately 190?. may be imparted to the lever ,whereas,if;the movable stop pin 12 is projected through any of theopenings :9 in'rear of the fixed stop pin 31, a varlable forward movement 1n excess of 12 rearwardly beyond the trip 27, the operator fully retracts the pin 12 within the barrel 11 so asto position the pin out of the path of travel of the trip 27, and, while holding: thepin in said retracted position, the arm' 10 is swung rearwardly past the tr-ip.

When it is desired to employ invoices having deeper printed matter, itisdesirable to rotate the feed element A more than a (10111 plete revolution in order to projectthe' leading ends of the invoice'a distance sufli cien-t to properly locate the line of writing. In this operation the movable stop pin 12 "is retracted from the path of movement of the operating handle 17 and held in its retracted. movement by means of the finger piece 13' being positioned in the offset seat 15, the pin,

however, extending between the barrel .11 and the disc 7 and across the path of movement of the trip 27 as shown inFigureB. Assuming that a record sheet and an invoice have been written, the operating lever 17 will be in the full line'positionas shown in Figure 1, with the pawl 19 released and the pawl throw-out trip 27 bearing against the stop pin 26. The operating handle is then moved forwardly, the clutch is engaged automatically as above stated after a short idle movement of the handle, and upon continued rotation of the handle in a forward or anticlockwise direction as viewed in Figure l, the feeding element A will be. rotated abackwardly. During this rotary movement of the handle 17, the pin 23 will clear the stop pin 12 and will subsequently engage the down-turned end 29 of the pawl throw-out trip 27 and bodily swing said trip until the edge 32 thereof contacts the stop pin 12- which projects across the path thereof. The invoice is then removed and a new invoice placed in position to be fed by the member A. The handle 17 is then rotated rearwardly or in a clockwise direction as viewed in'Figure 1 and'inasmuch as the. clutch is now engaged the feeding element A will be positively rotated in a feeding directiom-the handle 17 will be -moved'more than a complete revolution, and the pin 23, immediately following the completion of the revolution,

will engage the opposite edge of the downturned portion 2 9 of the trip27 and 'bodily' swing said trip rearwardly until the latter: engages the stop pin 26. As the handle 17 thus reaches the limit of its rearward move ment, the clutch will be automatically dis.

ITO

connected as above described. The invoice will now bewritten and the handle 17 will be rotated forwardly-or in an anti-clockwise direction as shown in Figure 1-, the first part of the movementof the handle being a free movement as above described, and the latter part being a positive feeding movement. The handle 17 in its forward or anticlockwise movement bodily moves the trip 27 therewith until the latter is stopped by contacting the pin 12. Thus the platen has been rotated more than arevolution' in each direction, the forward feeding movement thereof being greater than the rearward feeding movement, due to the relatively short idle. movement of the lever 17 during the first, part of the forward movement thereof. 'It will be noted, however, that the backward movement of the element A is less than the forward movement thereof and consequently the record sheet will be properly positioned for the next line of writing.

From the foregoing, it will be observed that I have provided a rotatable feeding element and operating means for rotating the element in opposite directions; that the operating means includes devices for effecting a feeding movement of more than a complete revolution of the element in one direction and a lesser movement in the opposite direction, and that means are provided for limiting the rotary movements of the element in opposite directions. It will be also observed that the stop 12 cooperates with the lever 17 to variably limit the rotary movement of the latter in a forward direction to less than 360; that, by projectingv the stop 12 through any of the openings 9 which are located rearwardly of the stop 31, an increased forward movement of the lever 17 may be obtained than if the stop were projecting through any of the open ings 9 in front of said stop 31, but each of said forward movements will be less than 360; and that the stop pin 12, when positioned in any of the openings 9 but not projecting therethrough, cooperates with the trip 27 to variablylimit the forward rota-- tion of thelever 17 after the latter has been rotated for more than 360.

I claim v 1. In a condensed billing machine, the combination of a rotatable feeding element, and operating means for rotating the element in opposite directions including an operating handle pivoted coaxially of the feeding element, a disc fixed against rotation and provided with a plurality. of openings arranged in a concentric series, a stop pin projectable through anyv predetermined one of said openings-into the path of movement of the handle, a ratchet wheel fixed to the feeding element to rotate therewith, a pawl pivoted to the handle for engaging the ratchet wheel, means .for yieldably retaining the pawl in either its engaged or disengaged position, afixedstop on the disc, a pawl throw-out trip axially journaled on the feeding element and movable between the adjustable stop pin and the fixed stop, a pawl throwin trip fixed to the disc between the' adjustable stop pin and the fixed stop, and means for retaining the stop pin in a retracted positionout of the path of movement of the handle. p a

2. In a condensed billing machine, the combination of a rotatable feeding element, and operating means'for rotating the element in opposite directions including an operating handle pivoted coaxially of the feeding element, a disc fixed against rotation and provided with a plurality of openings arranged in a concentric series, an arm rotatable on the element, a stop pin mount ed on the arm and normally projecting through any predetermined one of said openings of the disc into the path of movement of the handle, a ratchet wheel fixed to the feeding element to rotate therewith, a clutch interposed between the handle and the element, the handle and the feeding element being rotatable for more than a complete revolution during clutching engagement with the feeding element, a fixedstop on the disc, a clutch throw-out trip axially journaled on the feeding element and normally movable between the adjustable stop pin and the fixed stop, the stop pin being retractablefrom the path of movement of the handle whereby the handle may be rotated while clutched with the rotating element a distance greater than a complete revolution, the stop pin being returnable to normal position after the handle has passed the samewhereby the handle upon continued rotation in the same direction will move the clutch throw-out trip against the stop pin and thereby limit the movement of the handle in said direction and simiultaneously'efiect an opening of the clutch, and a clutch throw in trip fixed to the disc between the adjustable-stop pin and the fixed stop.

3. In a condensed billing machine, the combination ofva rotatable feeding element, and operating means for'rotating'th'e element in opposite directions including an operating handle pivoted coaxially of the feed-- 7 ing element, a disc fixed against rotation and provided with a plurality of-openings' arranged in a concentric series, an arm rotatable on the element, a stop pin mounted on the arm and normally pro ecting through any predetermined one of said openings of the disc into the path of movement of the handle, a ratchet wheel fixed to the feeding element to rotate therewith, a clutch interposed between the handle and the element, the handle and the feeding element being rotatable for more than a complete ,revo1u-' tion during clutching engagement with the i of the handle.

feeding element, a fixed stop on the disc, a clutch throw-out trip axially journaled on the feeding element and normally movable between the adjustable stop pin and the fixed stop, a clutch throw-in trip fixed to the disc between the adjustable stop pin and the fixed stop, the stop pin being retractable from the path of movement of the handle whereby the handle may be rotated while clutched with the rotating element a distance greater'than a complete revolution, the stop pin being returnable to normal position after the-handle has passed the same whereby the handle upon continued rotation in the same direction will move the clutch throw-out trip against the stop pin and thereby limit the movement of the handle in said direction and simultaneously efiect an opening of the clutch, and means for retaining the stop pin in a retracted position out of the path of movement 4. In a condensed billing machine, the combination of a rotatable feeding element, and operating means for rotating the ole ment in opposite directions including an operating handle pivoted coaxially of the feeding element, a disc fixed against rotation and provided with a plurality of openings arranged in a concentric series, an arm rotat able on the element, a barrel fixed to the outer end of the arm, a stop pin slidably mounted in the barrel and normally projecting through any predetermined one of the openings of the disc into the path of movement of the handle, a spring within the barrel for urging the pin towards the disc, a radially extending finger piece fixedto the pin and extending through the slot of the barrel, a ratchet wheel fixed to the feeding element to rotate therewith, a clutch interposed between the handle and the element, the handle and the feeding element being rotatable for more than a complete revolution during clutching engagement with the feeding element, a fixed stop on the disc, a-clutch throwout trip axially journaled on the feeding elelment and normally movable between the adjustable stop pin and the fixed stop, the stop pin being retractable from the path of movement of the handle whereby the handle may be rotated while clutched with the rotating element a distance greater than a complete revolution, the stop pin being returnable to normal position after the handle has passed the same whereby the handle upon continued rotation in the same direction will move the clutch throw-out trip against the stop pin and thereby limit the movement-of the handle in said direction and simultaneously effect an opening of the clutch, and a clutch throw-in trip fixed to the disc between the adjustable stoppin and thefixed stop.

5. In a condensedbilling machine the combination of a rotatable feeding element, and operating means for rotating the element pin and extending through the slot of barrel and movable into the lateral recess' to retain the pin 'in-its retracted position with the outer end thereof within an openingof ble' on the element, a barrel fixed to the outer end ofthe arm, a stop pin slidably-mounted in the barrel and normally projecting through any predetermined one of the open- 'ings of the disc into the path of movement of the handle, a spring within the barrel for urg ng the pin towards the disc, a radially extending finger piece fixed to the pinand extending through the slot ofthe barrel, a,

ratchet wheel fixed to the feeding elementt'o rotate therewith, a clutch interposed between the handle and the element, the handle and the feeding element being rotatable'fo r more than ,a complete revolution during clutching engagement with the feeding element, a fixed stop onthe disc, a clutch throwout trip axially journaled on the feeding element and normally movable between the ad justable stop pin and the fixed stop, a clutch throw-in trip fixedto the, disc between the adjustable stop pin and the fixed stop, the stop pin being retractable from the path of movement of the handle whereby the handle may be rotated while clutched withthe rotating element a distance greater than a complete revolution, the stop pin being returnabletonormal position after thehandle has passed the same whereby the handle upon continued rotation in the same direction will move the clutch throw-out trip against the stop pin and thereby limit the movement of the handle in said direction and simultaneouslyeifect an opening of the clutch, and

-means for retaining the stop pin in a retracted positionout of the path of movement of the handle but in the path of movement of the clutch throw-out trip comprising a lateral recess formed in the barrel for receiving the finger piece of the pin.

6. In a condensed billing machine, thle combination with a support, of a rotatable platen including an axle journaled thereon,

a disc mounted on the axle and fixed against rotation therewith, an operating handle fulcrumedon an axle for rotating the platen in opposite directions, said disc being provided with a plurality of openings arranged in a concentric series, an arm journaled on the axle between the supportand the disc, a barrel fixed to the outer end of the arm and provided with a longitudinal slot having a lateral recess, astop pin slidably mounted in the barrel for normally engaging in one of the openings of the disc, a springwithin'the barrel for urging the pin towards the disc, a' radiallyextending finger piece fixed to the the. I

vthe disc and out of the path of movementof the handle, saidstop pin normally, projecting into' the path of movement of the .handle to limit the rotation thereof in one direction, a ratchet wheel fixed to the feeding element to rotate therewith, a pawl pivoted to the handle for en aging the ratchet wheel, means for yielda ly retaining the pawl in either its engaged or disengaged position, a fixed stop on-the disc, a pawl throw- .movement of the handle whereby the handle maybe rotated while clutched with the ro tating element a distance greater than a complete revolution, the stoppin being returnable to normal position after the handle has [passed the same whereby the handle upon continued rotationin the same direction Wlll move the clutch throw-out trip against the stop pin and thereby limit the movement of the handle in'said direction and simultaneously effect an opening of the clutch, and

means for retaining the stop pin in a retracted position out of the path of movement of the handle. 7

7. In a condensed billing machine, the

combination with a support, of a rotatable platen including an axle-journaled thereon, a

disc mounted on the axle, a stud rigidly connecting the support and the disc, said disc being provided with a series, of openings advjacent its periphery and extendingaround the disc from a point in front of the stud to a point in rear thereof, an arm journaled on the axle between the support andthe disc, a

" stop pin mounted on said arm and projectable through any predetermined one of said openings in the disc, means forret-aining the stop pin in a retracted position with the outer end thereof within the opening, an operatinghandle journaled on the axle, on the side of the disc opposite the pin-carrying arm, a ratchet wheel fixed to the axle between the disc and the operating handle, a clutch mounted on the operating handle for engaging and disengaging the ratchet wheel and comprising a pawl pivoted to the handle and provided with a cam recess having seats at its opposite ends,a' bell-crank lever pivoted to the handle and provided with a pin engageable in the recess and projecting across the pawl towards the disc and terminating in close proximity thereto, and a coil spring connecting the pawl and bell-crank lever for retaining the latter ineither of its extreme posit ons, a pawl throw-in trip pin fixed to the disc and disposed substantially centrally of the series of openings'in the disc and in the path of movement of thepin carried by ,the bell-crank lever for throwing the pawl into clutching engagement with the ratchet wheel during forward movement of the operating handle, the movable stop being adapted to project into the path of movement of the operating handle to thereby limit its rotation to less than a complete revolution and retractable from the path ofmovement of the operating handle whereby the latter may be rotated for more than a completerevolution, a fixed stop on the disc in rear vof the pawl throw-in trip pin, and a pawl throw-out trip journaled on the axle between the stop pin carrying arm and the disc and limited in its movement in one direction by the fixed stop on the disc and'in its other di-'.

rection by the movable stop pin, the adjustable stop pin being retractable a distance sufficient to clear the pawl throw-out trip "combination with a support, ofa rotatable platen includingan axle journaled thereon,a discmounted on the axle, a stud rigidly connecting the support and thevdisc, jsaid disc being provided with a series of openings adjacent its periphery andextending around the disc from a pointin front of the stud to a point in rear thereof, an arm ournaled on the axle between the support and the disc, a barrel fixedto the outer end of the arm and provided with a 'longitudinal slot having a lateral recess, a stop pin slidably mounted in the barrel for engagement in any of the openings of the disc, a spring within the barrel for urging the spring towards the disc, a radially extending finger piece fixed to the pin and extending through the slot of the barrel and movable into the lateral recess to retain the pinin its retracted position with the outer end thereof within an opening of the disc, an operating handle, journaled on the axle on the side of the disc opposite the pin-carrying arm, a'ratchet wheel fixed Vto lever pivoted to the handle and provided with a pin engageable in the recess and projecting across the pawl towards the disc and termi mating in close proximity thereto, and a coil spring connecting the pawl and bell-crank lever for retaining the latter in either of its extreme positions, a pawl throw-in trip pin fixed to the disc and disposed substantially centrally of the series of openings in the disc to the handle and provided with acam recess having seats at its opposite ends, a bell-crank and in the path of movement of the pin carried by the bell-crank'lever for throwing the pawl into clutching engagement with the ratchet wheelduring forward movement of the; operating handle, the movable stop being adapted to project into the path of movement of the operating handle to thereby limit its rotation to less than a complete revolution and retractable from the path of movement of the operating handle whereby the latter may be rotated for more than a complete revolution, a fixed stop on the disc in rear of the pawl throw-in trip pin, and a pawl throwout trip journaled on the axle between the stop pin carrying arm and the disc and limited in its movement in one direction by the fixed stop on the disc and in its other direction by the movable stop pin, the adjustable stop pin being retractable a distance sufficient to clear the pawl throw-out trip whereby said stop pin may be moved to engage in any of the openings in the disc between the stud and the fixed stop on the disc.

In testimony whereof, I have hereuntosubscribed my name.

EBENEZER ALFRED DAVIDGE. 

